Similar in size to a Blue Tit with a brown back and pale underparts. It has a finely marked black and white head, with a spiky crest. It is mainly found in pinewoods, but also occurs in cork oak and Holm oak groves, especially where there is undergrowth. It feeds on insects such as caterpillars, spiders, mites and is helpful in reducing the impact of infestations. It is present throughout the year.